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Home My WebLink About20140145 Ver 1_Application_20140211*l �,-}..e�.. y.a /� l..T y� • \�� / w' � 1,,� ,� 4� . *v ,i fl��,°r i! ,-=�►'� . `; µi . .r��Gf, .a� �� ` t! ; �l�� r e"�,`1 � r. Y. ,y\ 1` •? ,.1•� STATE tJF NURTI� CA.ROLINA I�EPARTMENT tJF TRANSPORTATI4N PAT McCRORY P. O. Bc�x 25201, Raleigh, N� 2�'611-5202 Tt�NY TATA �rQ�'ERNC)R PHQNE: 9I 9-'733-2520 SECR.ETA�R� February 11, 2014 Mr. Andy wl�l�ams LJ. S. Army Cc�rps of Engineers Raleigh Regulatory Fleld Of�c� 3 3 31 �Ieritage Trade Drive, Suite 1 a5 Wake Fores�, NC 27587 Subj ect: Natianwide P�r�nit #� 14 Replace Brldge #96 on SR 1137 with 3-s�ded Bottamless Culvert Avery �ounty,l`�Torth Carolina Project Number: 17BP.11.R.54 (I)W(� Permit Fee: $2�U) Dear Mr. Williams: The North Carolina Department of Transportation �s scheduled to replace Bridge #9� wzth a 12'x 4'x 52' 3-sided bottomless culvert at the same locatic�n. The exist�ng bridge is 22' �ong b� 28' �vide. As you vvlll see in the photas, the existing b�°idge is basically functionin� as a 3-sided culvert today. No on-site detour is proposed. The pr�j ect will be phase constructed as shown in the EC plan sheets. Since the structure is b�ttomless, no mitigation ha.s been pursued. The streambed is bedrock cantralled. Stream impacts are t�.bulated below. Stream Impaets: Proposed Riprap Tatal Irnpacts Station Existing �tructure Temp�rary Impacts at t�►is S�ation Number Structure �ize Size I)ev�ateri� feet feet 52' long � 12' 41 (beyond Bridge #96 22'x 28' wide x 4' ta11 �;,� llmits� 30 95 brid e 3-sided culvert Perm. Fill/Riprap Impacts Total Project Impacts — 9� = 54 f�et feet The replacement of the existing bridge with the propo�ed new bottomless culvert will require temporary dewatering during footer construction and riprap installation. An 1111��'�`VlOL1S di1�e vvill be canstructed upstream af the exlsting structur� to create a sma11 pool. Clean water wi11 temporarily be plped through the constructian ar�a �.nd will be dischar�ed downstream. Any P. O. Box 25a, N. WILKESBORO, NC 28b59 PHONE (336) 667-911 I FAx (336) 667-4549 Mr. Andy Williams Bridge #9b on SR 1137, Avery Page 2 February 1 l, 2� 14 dirty water located �nside the construction area will be pumped into a silt bag if necessary. CJnce the nevv structure is in place, the impervious dik�s wi11 be removed and precanstruction streambed elevatlons �vili be restored. Constructian of this proj ect will requir� impacts to �vaters of th� LJnited �tates In the Frenc� Broacl River Basin. The existing bridge crosses a Birch�eld �reek (Class: 'WS-V; Trout). Th1s proj ect vvas reviewed for the presence of threaten�d and endangered species in September 20 � 3. The subj ect proj ect will have nc� effect on any federal�y listed endangered plant Qr animal species. Cultural resource compliance vvork has b�en completed with a no effects findin,g. The projec� impacts are not �igni�cant in �ature and shauld not remove or degrade �X1St111� water quality uses. Stormwater will be routed through grass or rock lined ditches, depending on the ditch �1ne slope. Tatal lar�d disturbance vvill b� less than 1 acre. Plpe sizes used will be the minlmum necessar� to create a safe roadway. By util�zing the erosion control measures outlined in the attachments to this application, downstream water quallt� standards w111 be protected. A11 appropriate BMPs will be used during construction. By copy of this electro�ic letter, 1t is requeste+� th�.t 1VIrs. Marla Chambers vvith the Nor�h Carolina Wildlife Resources �ammission comment directly to you CO�'10E'Z'�'1111� the 4�4 Nationwide Permit applicatlon with a copy sent to me. By copy of this electronlc letter, 1t is requested that th� Division of Water Quallty, 4011Wet1ands tlnit, issue the appropriate per�nit for �onstructlon of this project. It is requested th�t any comments rela�e�l to the 401 certi� cation be forv�arded directly to me with a capy sent to the �IJ� Army Cc�rps of Engineers. We wauld like to begin construction as soon as po�slble. If further ir�formatlon �s r�quired, please let me know. Your early review and consid�ration will be appreciated. Sincerel�, � �Ie ath S l aughter Division Enviranmental t�f�cer Enclosures cc: Marla Chambers, NCV��R.0 Amy Ghapman, Divisian of Water Quality Dave �V'anucha, Division of �Vater Quality Mike Pettyjohn, PE, Division Engineer David Wayne, l'E, Bridge Maintenanc� En�in�er Jami Guynn, Divisic�n Bridge Program Manager Heath Slaughter, D�vision Environmental Officer Neil Trivette, Roadside Enviranmental Field tJpe�rations Engineer O� �`�T�R ��. �� '��n �,� OffIC�? IJse 011�y: �.� p h F � �� : � Cc�rps action I a no. � � � � ,� � , s�:M� �: � �� -� � , , � �� v,x��x�� DWQ project no. �� , ' ,` r,";Mrv"�� .� �, �� ,��` ��,�� Farm llersion 1.3 Dec 1 C► 20�8 Pre-Co�nstruction Natifica�ion PCN Form � ) A. A licant Informa�ion 1. Processing 1a. Type(s) of appraval sought from the �or �` � Section 404 Perrnit � Section 14 Permit p 1 b. Specify Nationwide Permit (NWP) number: 14 or General Permit (�P} number: 1 c. Has the NWP or GP number been verified by the Carps? [� Yes � No 1 d. Type(s) of approval saught frorn the DWQ (check all that apply): � 441 Water Quality Certification -- Regular [� Non-4�4 Jurisdictional Generai Perm�t ❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authc�rization 1 e. 1s this notificatian solely far the record For the record onfy for C}WQ 441 FQr the record only for Corps Perrnit: because written appraual is nat required? Certification: ❑ Yes � No ❑ Yes � �lo 1 f. Is payment inta a mitigation bank or in-lieu fee program propased far mitigation �� N� o f i m p a c t s? I f s o, a t t a c h t h e a c c e p t a n c e I e t t e r f r o m mi ti g a tian ban k c�r in- lieu fee program. 1 g. Is the project Iocated in any of NC's twenty coastal counties. If yes, answer 1 h � Yes (��j No below. 1 h. Is the project located within a NC DCM Area af Environmental Concern (AEC)? ❑ Yes � No 2. Project Information 2a. N�me of project: Bridge #96 on SR 1137 2b. County: Avery 2c. Nearest municipality / town: Minneapolis Zd. Subdivision name: 2e. NCDC�T only, T.I. P. or state � 7BP 11. R.54 project na: 3. Owner Information 3a. Name(s) on Recc�rded Deed: NCDC�T 3b. Deed Book and Page No. 3c. Responsible Party (for LLC if applicable}: 3d. Street address: 8Q1 Statesville Road 3e. City, state, zip: North Wilkesbaro, NC 28659 3f. Telephone no.: 336-943-92�2 3g. Fax no.: 336-667-4549 3h. Emai! address: hslaughter�z7�,ncdofi.gov Page 1 af 14 P�N Form -- Version 1.3 December 1 a, 2048 Versian . ., 4. Applicant Information (if different from owner) 4a. Applicant is: �] Agent ❑ Other, specify: 4b. Name: 4c. Business name (if applicable): 4d. Street address: 4e. City, state, zip: 4f. Telephane no.: 4g. Fax no.: 4h. Email address: 5. Agent/Consultant Information (if applicable) 5a. Name: 5b. Business name (if applicable): 5c. Sfireet address: 5d. City, state, zip: 5e. Telephone no.: 5f. Fax nn.: 5g. Emaii addre�s: Page 2 r�f 10 PCN Form -- Version 1.3 Decerr�ber 14, 2Q48 Versian B. Project Informatian and Prior Project History 1. Property Identification 1 a. Property identification no. (tax PI N or parcel I D): 1 b. Site coardinates (in decimal degrees): L�titude: 36.08914 LQngitude: - 82.00231 (DD.DDDDQD) (-DD.DDC�DDD) 1 c. Property size: � 1 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.} to girchfield Creek proposed project: 2b. Water Quality Classification of nearest receiving water: WS-V; Trout 2c. River basin: French Broad 3. Project Description 3a. Describe the existing conditions on the site and the general land use in the vicinity c�f the project at the time c�f this application: Substandard bridge ta be replaced in a rural area 3b. List the total es�imated acreage af a!I existing wetlands on the property: 0 acres 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 140 linear feet 3d. Ex�lain the purpose af the proposed project: Upgrade substandard stream crassing 3e. Describe the overall project in detail, including the type af equipm�nt to be used: See attached caver letter. 4. Jurisdictional Determinations 4a. Have jurisdictional wetland or stream determinations by the Corps ar State been requested or obtained for this property / praject (including all prior phases) in the past? ❑�� Na C] Unknown Comments: 4b. If the Carps made the jurisdictional determination, what type of determinatian was made? ❑ Preliminary ❑ Final 4c. If yes, who delineated the jurisdictional areas? AgencylCansulfiant �ompany: Name (if known): C)ther: 4d. If yes, list the dates of the Gorps jurisdictional determinations or State determinations and attach document�tian. 5. Project History 5a. Have permits or certifications been requested or obtained for � Yes � No ❑ Unknown t h i s p r o j e c t { i n c l u d i n g a l l p r i o r p h a s e s} i n t h e p a s t? 5b. If yes, explain in detail according to "help file" instructions. 6. Future Project Plans 6a. Is this a phased project? ❑ Yes � No 6b. If yes, explain. Page 3 r�f 1Q PCN Form — Version �.3 December 10, 2�C�8 Version �. Proposed Impacts Inventory 1. impacts Summary 1 a. Which sections were completed below far your praject (check all that appiy): ❑ Wetlands � Streams - tributaries ❑Buffers ❑ Open Waters ❑ Pond Constructian 2. Wetland Impacts If there are wetland impacts proposed an the site, then complete this questian for each wetland area impacted. Za. 2b. 2c. 2d. 2e. 2f. Wetland impact Type of jurisdiction number — Type of impact Type of wetland Far�sted (Corps - 404, 1 a Area of impact Permanent (P) ar (if knawn} DWQ -- non-404, other} {acres) Tem ara T ❑ Yes ❑ Gorps W1 ❑ P � T No QWQ ❑ ❑ [� Yes Q Garps W2 ❑ P[� T No DWQ ❑ ❑ [� Yes ❑ Corps W3 ❑ P❑ T Nc� E�WQ [� c� Q ❑ Yes ❑ Corps W4 ❑ P❑ T � o DV1lQ � � ❑ Y�s ❑ Corps �� p � T No �WQ 0 ❑ ❑ Yes 0 Ccarps W6 ❑ P O T Nc� DWQ ❑ ❑ 2g. Total wetland impacts 2h. Comments: 3. Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then cc�mplete this question far all stream sites impacted. 3a. 3b. 3c. 3d. 3e. 3f. 3g. Stream impact Type of impact Stream name Perenniai Type of jurisdiction Average I►�npact number - (P�R) or (Corps - 404, 1� stre�m length Permanent (P) or inter�nittent p�� _�an_q.pq., width (Iinear TemporarY (T) CI �1T)? other) (feet) feet) Bottomless � PER (� Carps S1 � P(� T �uivert, Riprap & Birchfield Creek ��T �� 10 95 Dewatering � � S2 �P❑T 0 PER ❑ Corps ❑ I NT �] DWQ S3 P T ❑ PER � Gorps � � I NT DWQ ❑ d ❑ PER [� Corps �4 ❑ P❑ T I NT DWQ ❑ ❑ ❑ PER ❑ Corps S5 ❑ P❑ T I NT DVilQ 0 � [] PER ❑ Corps S6 ❑ P❑ T I NT DWQ ❑ ❑ 3h. Total stream and tributary impacts 95 3i. Comments: 41 feet dewater, 30 riprap, 24 bottomless culvert Page 4 af 1Q PC�N Form -- Version 1.3 Qecember 1�, 2048 �'ersion 4. Open Water Impacts If there are praposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic C�cean, or any ather apen water �►f the U.S. then individually list ali open water impacts below. 4a. 4b. 4c. 4d. 4e. Open water Name of waterbody impact number -- (if applicable) Type of impact UV�terbody type Area of impact (acres} Permanent (p) or Tem ora T C)1 ❑P[]T 02 ❑P�T 03 ❑P❑T 04 ❑POT 4f. Total open water impacts 4g. Comments: 5. Pond ar �ake Cc�nstruction if and or lake construction ro osed, then com Iete the chart below. 5a. 5b. �c. 5d. 5e. V1letland impacts (acres) Stream Impacts (feet} lJpland Pond ID Proposed use or purpose (acres} number of pond Flooded Filled Exc�vated Flooded Filled Excavated Flooded P1 P2 Sf. Total 5g. Comments: N/A 5h. Is a dam high hazard permit required? [� Yes � Rlo If yes, permit ID no: 5i. Expected pond surface area (acres}: 5j. Size of pond watershed (acres): 5k. Method of construction: 6. Buffer Impacts (for DWQ) If project will impact a protected riparian buffer, �hen complete the chart below. if yes, then individuaily list all buffer impacts beiow. If an im acts re uire miti atian, then ou MUST fili out Section D af this form. 6a. [� Neuse ❑ Tar-Pamlico [� C�ther: Project is in which protected basin? [� C�tawba [� Randlem�n 6b. 6c. 6d. �e. 6f. 6g. Buffer impact number -- Reason �uffer Zone '1 impact Zane 2 impact Permanent (P) or for Stream name mitigation (square feet} (squ�re feet) Tem arar T im act re uired? ❑ Yes B1 C]P❑T N� 0 C� Yes 62 ❑P❑T N� ❑ B3 ❑P❑T Q Yes ❑ No 6h. Total buffer impacts 6i. Comments: P�ge S af 10 PCN �orm — Version 1.3 December 14, 2�08 Versian .� D. Impact Justification and Mitigation 1. Avoidance and Minimization 1 a. Specifically describe measures taken ta avoid or minirnize the proposed impacts in designing praject. The culvert is bottomless and the length is the minimum needed to improve safety at this location. 1 b. Specifically describe measures taken to avoid or minimize the praposed impacts through constructian techniques. all appropriate BMPs will be used during construction 2. Compensatory Mitigation for Impacts ta Waters of the U.�. or Waters of the State 2a. Daes the project require Compensatory Mitigation for ❑ Yes � No impacts to Waters of the U.S. or Waters of the State? 2b. If yes, mitigatian is requir�d by (check all that apply). [� C�WQ ❑ Carps ❑ Mitigatian bank 2c. if yes, which mitigation aption will be used for this ,� ❑ Payment ta in-Iieu fee program pro�ect . ❑ Permittee Responsible Mitigatic�n 3. Complete if Using a Mitigation Bank 3a. Name of Mitigation Bank: 3b. Credits Purchased (attach receipt and letter} Type Quantity 3c. Comments. 4. Complete if Making a Payment to In-lieu Fee Program 4a. Approvai ietter from in-lieu fee program is attached. ❑ Y�s 4b. Stream mitigation requested: linear feet 4c. If using stream mitigation, stream temperature: ❑ warm � coal ❑cold 4d. Buffer mitigation requested (DWQ only): square feet 4e. Riparian wetland mitigafiion requested: acres 4f. Non-riparian wetland mitigation requested: acres 4g. Coastal (tidal) wetland mitigation requ�sted: acres 4h. Comments: 5. Camplete if Using a Permittee Responsible Mitigatian Plan 5a. If using a permittee responsible mitigation plan, provide a description af the prapo�ed mitigation plan. Page 6 of � 0 P�N Farm -- Version 'I .3 CJecember 1�, 2008 Versian 6. Buffer Mitigation (State Regulated Riparian Buffer Rules� -- required by DWQ 6a. Will the project result in an impact within a protected riparian buffer that requires ❑ Yes � No buffer mitigatian? 6b. 1f yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. �alculate the amount of mitigation required. 6c. 6d. 6e. �Q�� Reason for impact Total impact Multiplier Required mitig�tion (square feet) (square feet) Zane 1 3(2 for Catawba} Zone 2 1.5 6f. Total buffer mitigation required: 6g. If buffer mitigation is required, discuss what type af mitigation is p�oposed (e.g., payment to private mitigation bank, permittee responsible riparian buffer restor�atic�n, payment into an approved in-Iieu fee fund}. 6h. Comments: Page 7 ofi 1 Q P�N Form -- Version 1.3 December 1Q, 2�a8 Version E. Stormwater Management and Diffuse Flow Plan (required �y �WQ) 1. Diffuse Flow Plan 1 a. Does the project include or is it adjacent to protected riparian buff�rs identified � Yes � Na within one of the NC Riparian Buffer Protection Rules? 1 b. lfi yes, then is a diffuse flow plan included? If no, explain why. ❑ Yes ❑ No Comments: 2. Stormwater Mana ement Plan 2a. What is the overall percent imperviousness of this project? °fo 2b. Does this project require a Stormwat�r Management Plan? ❑ Yes � Na 2c. If this project D(JES NCJT require a Stormwater �/lanagement Plan, explain why: Disturbing Iess than 1 acre 2d. If this project DOES require a Stormwater IVlanagement Plan, then provide a brief, narr�tive description of the pl�n: [.� Cerkified Lc�cal Government 2e. Wh� will be responsible for the review of the Stormwater Management Plan? � DWQ �tormw�ter Program ❑ DWQ 441 U r� it 3. Certified Local Government Stormwater Review 3�. In which locai government's jurisdictian is this project? 0 Phase II 3b. Which of the followin locall -im lemented stormwater mana ement ro rams � N�W � Y p � � g 0 U S M P apply (check all that apply): ❑ Water Supply Watershed ❑ C�ther: 3c. Has the �pproved Stormwater Management Plan with proof of approval been Cj Yes � No attached? 4. DWQ Stormwater Pro ram Review ❑ Coa�tal caunti�s ❑ HQW 4a. Which of the fallowing state-implemented stormwater management pragrams apply 0 pRW (check all th�t apply}: [� Sessian Law 200�-246 ❑ (Jther: 4b. Has the approved Stormwater Management P1an with proof of approval been attached? 0 Yes ❑ No 5. DWQ 441 Unit Stormwater Review 5a. Does the Stormwater Management Plan meet the appropriate requirements? ��e� �� 5b, Have all of the 401 lJnit submittal requirements been met? [� Yes � No Page $ af 10 PCN Farm — Version �.3 December 10, 2008 Versi�n F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project invalve an expenditure of public (federallstate/local) funds or the y�s Na use of ublic federal/state land? � � p ( } 1 b. lf you answered "yes" ta the above, does the project require prep�ratian of an environrnental dc�cument pursuant ta the requirements af the N�tinnal or State 0 Yes � No (North Carolina) Environmental Policy Act (NEPAiSEPA}? � c. If you answered "yes" to the above, has the document review been finalized by the State Clearing House? (If so, attach � copy of the NEPA ar �EP� final approval letter.) ❑ Yes [� Na Comments: 2. Viotations (DWQ Requiremen�t) 2a. Is the site in violation af DWQ Wetland Ruie� (15A NCAC 2N .U5E��}, Isolated Wetland Rules (15A NCAC 2H .1300), �WQ SurFace W�ter or Wetland Standards, ❑ Yes � No or Riparian Buffer Rules (15A NCAG 26 .a2QQ}? 2b. Is this an after-the-fact permit application? ❑ Yes � No Zc. If yau answered "yes" to one or both of the above questions, provide an explanation of the violation(s): 3. Gumulative Impacts (DWQ Requirement) 3a. Wiil this project (based on past and reasonably anticipated future impacts) result in � Yes � No a d d i t i o n a l d e v e l o p m e n t, w h i c h c o u l d i m p� c t n e a r b y d o w n s t r e� m w a t e r q u a l i t y? 3b. If yau answered "ye�" to the above, submit a qualitative or quantitative cumulative impact �nalysis in accordance with the most recent DWQ policy. If yau answered "no," provide a short narrative description. 4. Sewage Disposal (DWQ Requirem�ent) 4a. Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge} of wastewater gener�ted from the proposed project, or available capacity of the subject facility. N/A Page 9 c�f 1(� PGN �orm -- Version 1.3 December 14, 20C�8 Version 5. Endangered Species and Designated Critical Habitat (Corps Requirement} 5a. Will this project occur in or near an area with federally protected specie� or ��es j� No habitat? 5b. Have you checked with the USFWS concerning Endangered Spe�ies Act ��e� � No �mpacts? [�.] Raleigh 5c. If yes, indicate the USFWS Field Office you have contacted. ❑ Asheville 5d. What data sources did you use to determine whether your site wauld impact Endangered Species or Designated Critical H�bitat? GIS and visuai observation 6. Essentiai Fish Habitat (Carps Requirement) 6a. Will this praject occur in ar near an area designated as essentiai fish habitat'? ❑ Yes � No 6b. What data sources did you use to determine whether yaur site wauld impact Essential Fish Habitat? WRC will comment 7. Historic ar Prehistoric Cultural Resources (Corps Requirement) 7a. Wilf this project occur in or near an area that the state, federal or firibal gavernments have designated as having historic or cultural preservation 0 Yes � No status (e.g., National Historic Trust designation or properties significant in North Carolina history and arc�aeology)? 7b. What data saurces did you use to determine whether your site w�uld impact historic or archeological resaurces? Praject was reviewed by the CJHE. Project was determined to have no effect. 8. Flood Zone Designatian (Corps Requirement} 8a. Will this project occur in a FEMA-designated 100-year floodplain? ❑ Yes � No 8b. If yes, explain haw praject meets FEMA requirements: 8c. What source(s) did you use to make the floodplain determination? 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Design/Future:Existing: Supplemental: Trout Waters (Tr) None Primary: Birchfield Creek French Broad 7-2-11 jclemmons@sungatedesign.com 20' Wide Paved Roadway 16' Wide Paved Roadway N/A NCDWQ Stream Index No.: Project/TIP No.: NCDOT Contact: Project No.:17BP.11.R.54 (Culvert #050096) Contractor / Designer: rhenegar@ncdot.gov Raleigh, NC 27699-1590 General Project Information Address: 10/8/2013 915 Jones Franklin Road 1590 Mail Service Center Raleigh, NC 27606 North Carolina Department of Transportation Highway Stormwater Program STORMWATER MANAGEMENT PLAN FOR LINEAR ROADWAY PROJECTS Randy Henegar, PE Bridge Replacement ac. General Project Narrative:This project involves the replacement of Bridge No. 050096 over Birchfield Creek on SR 1137 (Birchfield Creek Rd) in Avery County, NC. The bridge will be replaced with a 1 @ 12' x 4' cast-in-place, three sided, bottomless culvert. The bottomless culvert will be constructed on sloped caps that will rest on piles with sheeting driven in front to protect against scour. The proposed culvert is 54.9' in length at a skew of 145° to the proposed roadway and has a slope of 8.8%. The first option considered for replacing the existing bridge was a 36" girder bridge. This option was ruled out because the girders blocked the channel to an extent that the bidge would not have functioned hydraulically. In order for a girder bridge to work the proposed roadway grade would have needed to have been raised at least 2 feet which was not possible at this site. With this in mind the proposed bottomless culvert was chosen. Bridge replacement and associated roadway improvements have been designed in a manner to minimize the increase in impervious surface area to the maximum extent possible. The roadway ditch in the North West quadrant of the project shall be lined with permanent soil reinforcement matting in order to stabilize the ditch and reduce erosion. Water in this ditch flows to a drainage inlet where it is carried through a 15" driveway pipe and empties into a depression in front of an existing spring box. It is then picked up by another 15" driveway pipe which carries the water underneath an existing access road and empties onto rip-rap toe protection along the northern, down-stream side of the proposed culvert. The roadway ditch in the South East quadrant shall also be lined with permanent soil reinforcement matting in order to stabilize the ditch and reduce erosion. This proposed roadway ditch ties to the existing drainage ditch. Typical Cross Section Description: References 100 0.18 Average Daily Traffic (veh/hr/day): ac. Other Stream Classification: Sungate Design Group, PA City/Town: (919) 859-2243 Hydraulics Unit Address: Newland (919) 707-6726 Avery No None NCDWQ Surface Water Classification for Primary Receiving Water 303(d) Impairments: River Basin(s): Primary Receiving Water: Water Supply V (WS-V) Buffer Rules in Effect Project Description None Surrounding Land Use: Rural Residential0.07 100 0.16Project Built-Upon Area (ac.) Proposed Project Existing Site Project Length (lin. Miles or feet): Hand Existing Existing Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural Site Station Structure Fill In Fill In in Clearing in SW SW Impacts Impacts Stream No.(From/To)Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp.Design (ac)(ac)(ac)(ac)(ac)(ac)(ac)(ft)(ft)(ft) 12+20-12+52 -L-BOTTOMLESS CULVERT < 0.01 24 11+56 -11+98 -L-STREAMBANK STABILIZATION < 0.01 29 12+31 - 12+89 -L-STREAMBANK STABILIZATION < 0.01 < 0.01 30 12 TOTALS*: 0.01 0.01 54 41 0 *Rounded totals are sum of actual impacts NOTES: ATN Revised 3/12/13 SHEET 5 OF 5 NC DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS 02-04-2014 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS AVERY COUNTY BRIDGE 096 ON SR 1137 OVER BIRCHFIELD CREEK STABILIZATION REQUIREMENTS: Stabilization for this project shall comply with the time frame guidelines as specified by the NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina Department of Environment and Natural Resources Division of Water Quality. Temporary or permanent ground cover stabilization shall occur within 7 calendar days from the last land- disturbing activity, with the following exceptions in which temporary or permanent ground cover shall be provided in 14 calendar days from the last land-disturbing activity: • Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less • Slopes 3:1 or flatter, with a slope of length of 50 ft. or less • Slopes 4:1 or flatter The stabilization timeframe for High Quality Water (HQW) Zones shall be 7 calendar days with no exceptions for slope grades or lengths. High Quality Water Zones (HQW) Zones are defined by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent ground cover stabilization shall be achieved in accordance with the provisions in this contract and as directed. SEEDING AND MULCHING: (West) The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone, shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall be determined. All rates are in pounds per acre. Shoulder and Median Areas August 1 - June 1 May 1 - September 1 20# Kentucky Bluegrass 20# Kentucky Bluegrass 75# Hard Fescue 75# Hard Fescue 25# Rye Grain 10# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000# Limestone Areas Beyond the Mowing Pattern, Waste and Borrow Areas: August 1 - June 1 May 1 - September 1 100# Tall Fescue 100# Tall Fescue 15# Kentucky Bluegrass 15# Kentucky Bluegrass 30# Hard Fescue 30# Hard Fescue 25# Rye Grain 10# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000# Limestone Approved Tall Fescue Cultivars 2nd Millennium Duster Magellan Rendition Avenger Endeavor Masterpiece Scorpion Barlexas Escalade Matador Shelby Barlexas II Falcon II, III, IV & V Matador GT Signia Barrera Fidelity Millennium Silverstar Barrington Finesse II Montauk Southern Choice II Biltmore Firebird Mustang 3 Stetson Bingo Focus Olympic Gold Tarheel Bravo Grande II Padre Titan Ltd Cayenne Greenkeeper Paraiso Titanium Chapel Hill Greystone Picasso Tomahawk Chesapeake Inferno Piedmont Tacer Constitution Justice Pure Gold Trooper Chipper Jaguar 3 Prospect Turbo Coronado Kalahari Quest Ultimate Coyote Kentucky 31 Rebel Exeda Watchdog Davinci Kitty Hawk Rebel Sentry Wolfpack Dynasty Kitty Hawk 2000 Regiment II Dominion Lexington Rembrandt Approved Kentucky Bluegrass Cultivars: Alpine Bariris Envicta Rugby Apollo Bedazzled Impact Rugby II Arcadia Bordeaux Kenblue Showcase Arrow Champagne Midnight Sonoma Award Chicago II Midnight II Approved Hard Fescue Cultivars: Chariot Nordic Rhino Warwick Firefly Oxford Scaldis II Heron Reliant II Spartan II Minotaur Reliant IV Stonehenge On cut and fill slopes 2:1 or steeper add 20# Sericea Lespedeza January 1 - December 31. Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the 1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as a 10-20-20 analysis and as directed. TEMPORARY SEEDING: Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate of 400 pounds and seeded at the rate of 50 pounds per acre. German Millet, or Browntop Millet shall be used in summer months and rye grain during the remainder of the year. The Engineer will determine the exact dates for using each kind of seed. FERTILIZER TOPDRESSING: Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of fertilizer may be used provided the 2-1-1 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as 16-8- 8 analysis and as directed. SUPPLEMENTAL SEEDING: The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, and the rate of application may vary from 25# to 75# per acre. The actual rate per acre will be determined prior to the time of topdressing and the Contractor will be notified in writing of the rate per acre, total quantity needed, and areas on which to apply the supplemental seed. Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating seed into the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be used where degree of slope prevents the use of a sod seeder. MOWING: The minimum mowing height on this project shall be six inches. STABILIZATION REQUIREMENTS: Stabilization for this project shall comply with the time frame guidelines as specified by the NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina Department of Environment and Natural Resources Division of Water Quality. Temporary or permanent ground cover stabilization shall occur within 7 calendar days from the last land- disturbing activity, with the following exceptions in which temporary or permanent ground cover shall be provided in 14 calendar days from the last land-disturbing activity: • Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less • Slopes 3:1 or flatter, with a slope of length of 50 ft. or less • Slopes 4:1 or flatter The stabilization timeframe for High Quality Water (HQW) Zones shall be 7 calendar days with no exceptions for slope grades or lengths. High Quality Water Zones (HQW) Zones are defined by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent ground cover stabilization shall be achieved in accordance with the provisions in this contract and as directed. NATIVE GRASS SEEDING AND MULCHING: (West) Native Grass Seeding and Mulching shall be performed on the disturbed areas of wetlands and riparian areas, and adjacent to Stream Relocation and/or trout stream construction within a 50 foot zone on both sides of the stream or depression, measured from top of stream bank or center of depression. The stream bank of the stream relocation shall be seeded by a method that does not alter the typical cross section of the stream bank. Native Grass Seeding and Mulching shall also be performed in the permanent soil reinforcement mat section of preformed scour holes, and in other areas as directed. The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone, shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall be determined. All rates are in pounds per acre. August 1 - June 1 May 1 – September 1 18# Creeping Red Fescue 18# Creeping Red Fescue 8# Big Bluestem 8# Big Bluestem 6# Indiangrass 6# Indiangrass 4# Switchgrass 4# Switchgrass 35# Rye Grain 25# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000 Limestone Approved Creeping Red Fescue Cultivars: Aberdeen Boreal Epic Cindy Lou Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the 1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as a 10-20-20 analysis and as directed. Temporary Seeding Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate of 400 pounds and seeded at the rate of 50 pounds per acre. German Millet or Browntop Millet shall be used in summer months and rye grain during the remainder of the year. The Engineer will determine the exact dates for using each kind of seed. Fertilizer Topdressing Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of fertilizer may be used provided the 2-1-1 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as 16-8- 8 analysis and as directed. Supplemental Seeding The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, and the rate of application may vary from 25# to 75# per acre. The actual rate per acre will be determined prior to the time of topdressing and the Contractor will be notified in writing of the rate per acre, total quantity needed, and areas on which to apply the supplemental seed. Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating seed into the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be used where degree of slope prevents the use of a sod seeder. Mowing The minimum mowing height shall be 6 inches. Measurement and Payment Native Grass Seeding and Mulching will be measured and paid for in accordance with Article 1660-8 of the Standard Specifications. LAWN TYPE APPEARANCE: All areas adjacent to lawns must be hand finished as directed to give a lawn type appearance. Remove all trash, debris, and stones ¾" and larger in diameter or other obstructions that could interfere with providing a smooth lawn type appearance. These areas shall be reseeded to match their original vegetative conditions, unless directed otherwise by the Field Operations Engineer. REFORESTATION: Description Reforestation will be planted within interchanges and along the outside borders of the road, and in other areas as directed. Reforestation is not shown on the plan sheets. See the Reforestation Detail Sheet. All non-maintained riparian buffers impacted by the placement of temporary fill or clearing activities shall be restored to the preconstruction contours and revegetated with native woody species. The entire Reforestation operation shall comply with the requirements of Section 1670 of the Standard Specifications. Materials Reforestation shall be bare root seedlings 12"-18" tall. Construction Methods Reforestation shall be shall be planted as soon as practical following permanent Seeding and Mulching. The seedlings shall be planted in a 16-foot wide swath adjacent to mowing pattern line, or as directed. Root dip: The roots of reforestation seedlings shall be coated with a slurry of water, and either a fine clay (kaolin) or a superabsorbent that is designated as a bare root dip. The type, mixture ratio, method of application, and the time of application shall be submitted to the Engineer for approval. With the approval of the Engineer, seedlings may be coated before delivery to the job or at the time of planting, but at no time shall the roots of the seedlings be allowed to dry out. The roots shall be moistened immediately prior to planting. Seasonal Limitations: Reforestation shall be planted from November 15 through March 15. Measurement and Payment Reforestation will be measured and paid for in accordance with Article 1670-17 of the Standard Specifications. ENVIRONMENTALLY SENSITIVE AREAS: Description This project is located in an Environmentally Sensitive Area. This designation requires special procedures to be used for clearing and grubbing, temporary stream crossings, and grading operations within the Environmentally Sensitive Areas identified on the plans and as designated by the Engineer. This also requires special procedures to be used for seeding and mulching and staged seeding within the project. The Environmentally Sensitive Area shall be defined as a 50-foot buffer zone on both sides of the stream or depression measured from top of streambank or center of depression. Construction Methods (A) Clearing and Grubbing In areas identified as Environmentally Sensitive Areas, the Contractor may perform clearing operations, but not grubbing operations until immediately prior to beginning grading operations as described in Article 200-1 of the Standard Specifications. Only clearing operations (not grubbing) shall be allowed in this buffer zone until immediately prior to beginning grading operations. Erosion control devices shall be installed immediately following the clearing operation. (B) Grading Once grading operations begin in identified Environmentally Sensitive Areas, work shall progress in a continuous manner until complete. All construction within these areas shall progress in a continuous manner such that each phase is complete and areas are permanently stabilized prior to beginning of next phase. Failure on the part of the Contractor to complete any phase of construction in a continuous manner in Environmentally Sensitive Areas will be just cause for the Engineer to direct the suspension of work in accordance with Article 108-7 of the Standard Specifications. (C) Temporary Stream Crossings Any crossing of streams within the limits of this project shall be accomplished in accordance with the requirements of Subarticle 107-12 of the Standard Specifications. (D) Seeding and Mulching Seeding and mulching shall be performed in accordance with Section 1660 of the Standard Specifications and vegetative cover sufficient to restrain erosion shall be installed immediately following grade establishment. Seeding and mulching shall be performed on the areas disturbed by construction immediately following final grade establishment. No appreciable time shall lapse into the contract time without stabilization of slopes, ditches and other areas within the Environmentally Sensitive Areas. (E) Stage Seeding The work covered by this section shall consist of the establishment of a vegetative cover on cut and fill slopes as grading progresses. Seeding and mulching shall be done in stages on cut and fill slopes that are greater than 20 feet in height measured along the slope, or greater than 2 acres in area. Each stage shall not exceed the limits stated above. Additional payments will not be made for the requirements of this section, as the cost for this work shall be included in the contract unit prices for the work involved. MINIMIZE REMOVAL OF VEGETATION: The Contractor shall minimize removal of vegetation at stream banks and disturbed areas within the project limits as directed. STOCKPILE AREAS: The Contractor shall install and maintain erosion control devices sufficient to contain sediment around any erodible material stockpile areas as directed. ACCESS AND HAUL ROADS: At the end of each working day, the Contractor shall install or re-establish temporary diversions or earth berms across access/haul roads to direct runoff into sediment devices. Silt fence sections that are temporarily removed shall be reinstalled across access/haul roads at the end of each working day. WASTE AND BORROW SOURCES: Payment for temporary erosion control measures, except those made necessary by the Contractor’s own negligence or for his own convenience, will be paid for at the appropriate contract unit price for the devices or measures utilized in borrow sources and waste areas. No additional payment will be made for erosion control devices or permanent seeding and mulching in any commercial borrow or waste pit. All erosion and sediment control practices that may be required on a commercial borrow or waste site will be done at the Contractor’s expense. All offsite Staging Areas, Borrow and Waste sites shall be in accordance with “Borrow and Waste Site Reclamation Procedures for Contracted Projects” located at: http://www.ncdot.gov/doh/operations/dp_chief_eng/roadside/fieldops/downloads/Files/Contracte dReclamationProcedures.pdf All forms and documents referenced in the “Borrow and Waste Site Reclamation Procedures for Contracted Projects” shall be included with the reclamation plans for offsite staging areas, and borrow and waste sites. TEMPORARY DIVERSION: This work consists of installation, maintenance, and cleanout of Temporary Diversions in accordance with Section 1630 of the Standard Specifications. The quantity of excavation for installation and cleanout will be measured and paid for as Silt Excavation in accordance with Article 1630-4 of the Standard Specifications. SAFETY FENCE AND JURISDICTIONAL FLAGGING: Description Safety Fence shall consist of furnishing materials, installing and maintaining polyethylene or polypropylene fence along the outside riparian buffer, wetland, or water boundary, or other boundaries located within the construction corridor to mark the areas that have been approved to infringe within the buffer, wetland, endangered vegetation, culturally sensitive areas or water. The fence shall be installed prior to any land disturbing activities. Interior boundaries for jurisdictional areas noted above shall be delineated by stakes and highly visible flagging. Jurisdictional boundaries at staging areas, waste sites, or borrow pits, whether considered outside or interior boundaries shall be delineated by stakes and highly visible flagging. Materials (A) Safety Fencing Polyethylene or polypropylene fence shall be a highly visible preconstructed safety fence approved by the Engineer. The fence material shall have an ultraviolet coating. Either wood posts or steel posts may be used. Wood posts shall be hardwood with a wedge or pencil tip at one end, and shall be at least 5 ft. in length with a minimum nominal 2" x 2” cross section. Steel posts shall be at least 5 ft. in length, and have a minimum weight of 0.85 lb/ft of length. (B) Boundary Flagging Wooden stakes shall be 4 feet in length with a minimum nominal 3/4” x 1-3/4” cross section. The flagging shall be at least 1” in width. The flagging material shall be vinyl and shall be orange in color and highly visible. Construction Methods No additional clearing and grubbing is anticipated for the installation of this fence. The fence shall be erected to conform to the general contour of the ground. (A) Safety Fencing Posts shall be set at a maximum spacing of 10 ft., maintained in a vertical position and hand set or set with a post driver. If hand set, all backfill material shall be thoroughly tamped. Wood posts may be sharpened to a dull point if power driven. Posts damaged by power driving shall be removed and replaced prior to final acceptance. The tops of all wood posts shall be cut at a 30- degree angle. The wood posts may, at the option of the Contractor, be cut at this angle either before or after the posts are erected. The fence geotextile shall be attached to the wood posts with one 2" galvanized wire staple across each cable or to the steel posts with wire or other acceptable means. Place construction stakes to establish the location of the safety fence in accordance with Article 105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for the staking of the safety fence. All stakeouts for safety fence shall be considered incidental to the work being paid for as “Construction Surveying”, except that where there is no pay item for construction surveying, all safety fence stakeout will be performed by state forces. The Contractor shall be required to maintain the safet y fence in a satisfactory condition for the duration of the project as determined by the Engineer. (B) Boundary Flagging Boundary flagging delineation of interior boundaries shall consist of wooden stakes on 25 feet maximum intervals with highly visible orange flagging attached. Stakes shall be installed a minimum of 6” into the ground. Interior boundaries may be staked on a tangent that runs parallel to buffer but must not encroach on the buffer at any location. Interior boundaries of hand clearing shall be identified with a different colored flagging to distinguish it from mechanized clearing. Boundary flagging delineation of interior boundaries will be placed in accordance with Article 105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for delineation of the interior boundaries. This delineation will be considered incidental to the work being paid for as Construction Surveying, except that where there is no pay item or construction surveying the cost of boundary flagging delineation shall be included in the unit prices bid for the various items in the contract. Installation for delineation of all jurisdictional boundaries at staging areas, waste sites, or borrow pits shall consist of wooden stakes on 25 feet maximum intervals with highly visible orange flagging attached. Stakes shall be installed a minimum of 6” into the ground. Additional flagging may be placed on overhanging vegetation to enhance visibility but does not substitute for installation of stakes. Installation of boundary flagging for delineation of all jurisdictional boundaries at staging areas, waste sites, or borrow pits shall be performed in accordance with Subarticle 230-4(B)(3)(d) or Subarticle 802-2(F) of the Standard Specifications. No direct pay will be made for this delineation, as the cost of same shall be included in the unit prices bid for the various items in the contract. The Contractor shall be required to maintain alternative stakes and highly visible flagging in a satisfactory condition for the duration of the project as determined by the Engineer. Measurement and Payment Safety Fence will be measured and paid as the actual number of linear feet of polyethylene or polypropylene fence installed in place and accepted. Such payment will be full compensation including but not limited to furnishing and installing fence geotextile with necessary posts and post bracing, staples, tie wires, tools, equipment and incidentals necessary to complete this work. Payment will be made under: Pay Item Pay Unit Safety Fence Linear Foot PERMANENT SOIL REINFORCEMENT MAT: Description This work consists of furnishing and placing Permanent Soil Reinforcement Mat, of the type specified, over previously prepared areas as directed. Materials The product shall be a permanent erosion control reinforcement mat and shall be constructed of synthetic or a combination of coconut and synthetic fibers evenly distributed throughout the mat between a bottom UV stabilized netting and a heavy duty UV stabilized top net. The matting shall be stitched together with UV stabilized polypropylene thread to form a permanent three-dimensional structure. The mat shall have the following minimum physical properties: Property Test Method Value Unit Light Penetration ASTM D6567 9 % Thickness ASTM D6525 0.40 in Mass Per Unit Area ASTM D6566 0.55 lb/sy Tensile Strength ASTM D6818 385 lb/ft Elongation (Maximum) ASTM D6818 49 % Resiliency ASTM D1777 >70 % UV Stability * ASTM D4355 >80 % Porosity (Permanent Net) ECTC Guidelines >85 % Maximum Permissible Shear Stress (Vegetated) Performance Bench Test >8.0 lb/ft2 Maximum Allowable Velocity (Vegetated) Performance Bench Test >16.0 ft/s *ASTM D1682 Tensile Strength and % strength retention of material after 1000 hours of exposure. Submit a certification (Type 1, 2, or 3) from the manufacturer showing: (A) the chemical and physical properties of the mat used, and (B) conformance of the mat with this specification. Construction Methods Matting shall be installed in accordance with Subarticle 1631-3(B) of the Standard Specifications. All areas to be protected with the mat shall be brought to final grade and seeded in accordance with Section 1660 of the Standard Specifications. The surface of the soil shall be smooth, firm, stable and free of rocks, clods, roots or other obstructions that would prevent the mat from lying in direct contact with the soil surface. Areas where the mat is to be placed will not need to be mulched. Measurement and Payment Permanent Soil Reinforcement Mat will be measured and paid for as the actual number of square yards measured along the surface of the ground over which Permanent Soil Reinforcement Mat is installed and accepted. Overlaps will not be included in the measurement, and will be considered as incidental to the work. Such payment shall be full compensation for furnishing and installing the mat, including overlaps, and for all required maintenance. Payment will be made under: Pay Item Pay Unit Permanent Soil Reinforcement Mat Square Yard WATTLES WITH POLYACRYLAMIDE (PAM): Description Wattles are tubular products consisting of excelsior fibers encased in synthetic netting. Wattles are used on slopes or channels to intercept runoff and act as a velocity break. Wattles are to be placed at locations shown on the plans or as directed. Installation shall follow the detail provided in the plans and as directed. Work includes furnishing materials, installation of wattles, matting installation, PAM application, and removing wattles. Materials Wattle shall meet the following specifications: 100% Curled Wood (Excelsior) Fibers Minimum Diameter 12 in. Minimum Density 2.5 lb/ft3 +/- 10% Net Material Synthetic Net Openings 1 in. x 1 in. Net Configuration Totally Encased Minimum Weight 20 lb. +/- 10% per 10 ft. length Anchors: Stakes shall be used as anchors. Wooden Stakes: Provide hardwood stakes a minimum of 2-ft. long with a 2 in. x 2 in. nominal square cross section. One end of the stake must be sharpened or beveled to facilitate driving down into the underlying soil. Matting shall meet the requirements of Article 1060-8 of the Standard Specifications, or shall meet specifications provided elsewhere in this contract. Provide staples made of 0.125" diameter new steel wire formed into a u shape not less than 12" in length with a throat of 1" in width. Polyacrylamide (PAM) shall be applied in powder form and shall be anionic or neutrally charged. Soil samples shall be obtained in areas where the wattles will be placed, and from offsite material used to construct the roadway, and analyzed for the appropriate PAM flocculant to be utilized with each wattle. The PAM product used shall be listed on the North Carolina Department of Environment and Natural Resources (NCDENR) Division of Water Quality (DWQ) web site as an approved PAM product for use in North Carolina. Construction Methods Wattles shall be secured to the soil by wire staples approximately every 1 linear foot and at the end of each section of wattle. A minimum of 4 stakes shall be installed on the downstream side of the wattle with a maximum spacing of 2 linear feet along the wattle, and according to the detail. Install a minimum of 2 stakes on the upstream side of the wattle according to the detail provided in the plans. Stakes shall be driven into the ground a minimum of 10 in. with no more than 2 in. projecting from the top of the wattle. Drive stakes at an angle according to the detail provided in the plans. Only install wattle(s) to a height in ditch so flow will not wash around wattle and scour ditch slopes and according to the detail provided in the plans and as directed. Overlap adjoining sections of wattles a minimum of 6 in. Installation of matting shall be in accordance with the detail provided in the plans, and in accordance with Article 1631-3 of the Standard Specifications, or in accordance with specifications provided elsewhere in this contract. Apply PAM over the lower center portion of the wattle where the water is going to flow over at a rate of 2 ounces per wattle, and 1 ounce of PAM on matting on each side of the wattle. PAM applications shall be done during construction activities after every rainfall event that is equal to or exceeds 0.50 in. The Contractor shall maintain the wattles until the project is accepted or until the wattles are removed, and shall remove and dispose of silt accumulat ions at the wattles when so directed in accordance with the requirements of Section 1630 of the Standard Specifications. Measurement and Payment Wattles will be measured and paid for by the actual number of linear feet of wattles which are installed and accepted. Such price and payment will be full compensation for all work covered by this section, including, but not limited to, furnishing all materials, labor, equipment and incidentals necessary to install the Wattles. Matting will be measured and paid for in accordance with Article 1631-4 of the Standard Specifications, or in accordance with specifications provided elsewhere in this contract. Polyacrylamide(PAM) will be measured and paid for by the actual weight in pounds of PAM applied to the wattles. Such price and payment will be full compensation for all work covered by this section, including, but not limited to, furnishing all materials, labor, equipment and incidentals necessary to apply the Polyacrylamide(PAM). Payment will be made under: Pay Item Pay Unit Polyacrylamide(PAM) Pound Wattle Linear Foot IMPERVIOUS DIKE: Description This work consists of furnishing, installing, maintaining, and removing an Impervious Dike for the purpose of diverting normal stream flow around the construction site. The Contractor shall construct an impervious dike in such a manner approved by the Engineer. The impervious dike shall not permit seepage of water into the construction site or contribute to siltation of the stream. The impervious dike shall be constructed of an acceptable material in the locations noted on the plans or as directed. Materials Acceptable materials shall include but not be limited to sheet piles, sandbags, and/or the placement of an acceptable size stone lined with polypropylene or other impervious geotextile. Earth material shall not be used to construct an impervious dike when it is in direct contact with the stream unless vegetation can be established before contact with the stream takes place. Measurement and Payment Impervious Dike will be measured and paid as the actual number of linear feet of impervious dike(s) constructed, measured in place from end to end of each separate installation that has been completed and accepted. Such price and payment will be full compensation for all work including but not limited to furnishing materials, construction, maintenance, and removal of the impervious dike. Payment will be made under: Pay Item Pay Unit Impervious Dike Linear Foot TEMPORARY PIPE FOR CULVERT CONSTRUCTION: Description This work consists of furnishing, installing, maintaining and removing any and all temporary pipe used on this project in conjunction with the culvert construction. Construction Methods The Contractor shall install temporary pipe in locations shown on the plans in such a manner approved by the Engineer. The temporary pipe shall provide a passageway for the stream through the work-site. The minimum size requirements will be as stated on the erosion control plans. Measurement and Payment __" Temporary Pipe will be measured and paid for at the contract unit price per linear foot of temporary pipe approved by the Engineer and measured in place from end to end. Such price and payment will be full compensation for all work covered by this section including but not limited to furnishing all materials required for installation, construction, maintenance, and removal of temporary pipe. Payment will be made under: Pay Item Pay Unit __" Temporary Pipe Linear Foot (Version 1.2; Released July 2012) 17BP.11.R.54 (Culvert #050096)County(ies):Avery Page 1 of 1 Project Type:Date: Phone:Phone: Email:Email: County(ies): CAMA County? Design/Future:Existing: Supplemental: Trout Waters (Tr) None Primary: Birchfield Creek French Broad 7-2-11 jclemmons@sungatedesign.com 20' Wide Paved Roadway 16' Wide Paved Roadway N/A NCDWQ Stream Index No.: Project/TIP No.: NCDOT Contact: Project No.:17BP.11.R.54 (Culvert #050096) Contractor / Designer: rhenegar@ncdot.gov Raleigh, NC 27699-1590 General Project Information Address: 10/8/2013 915 Jones Franklin Road 1590 Mail Service Center Raleigh, NC 27606 North Carolina Department of Transportation Highway Stormwater Program STORMWATER MANAGEMENT PLAN FOR LINEAR ROADWAY PROJECTS Randy Henegar, PE Bridge Replacement ac. General Project Narrative:This project involves the replacement of Bridge No. 050096 over Birchfield Creek on SR 1137 (Birchfield Creek Rd) in Avery County, NC. The bridge will be replaced with a 1 @ 12' x 4' cast-in-place, three sided, bottomless culvert. The bottomless culvert will be constructed on sloped caps that will rest on piles with sheeting driven in front to protect against scour. The proposed culvert is 54.9' in length at a skew of 145° to the proposed roadway and has a slope of 8.8%. The first option considered for replacing the existing bridge was a 36" girder bridge. This option was ruled out because the girders blocked the channel to an extent that the bidge would not have functioned hydraulically. In order for a girder bridge to work the proposed roadway grade would have needed to have been raised at least 2 feet which was not possible at this site. With this in mind the proposed bottomless culvert was chosen. Bridge replacement and associated roadway improvements have been designed in a manner to minimize the increase in impervious surface area to the maximum extent possible. The roadway ditch in the North West quadrant of the project shall be lined with permanent soil reinforcement matting in order to stabilize the ditch and reduce erosion. Water in this ditch flows to a drainage inlet where it is carried through a 15" driveway pipe and empties into a depression in front of an existing spring box. It is then picked up by another 15" driveway pipe which carries the water underneath an existing access road and empties onto rip-rap toe protection along the northern, down-stream side of the proposed culvert. The roadway ditch in the South East quadrant shall also be lined with permanent soil reinforcement matting in order to stabilize the ditch and reduce erosion. This proposed roadway ditch ties to the existing drainage ditch. Typical Cross Section Description: References 100 0.18 Average Daily Traffic (veh/hr/day): ac. Other Stream Classification: Sungate Design Group, PA City/Town: (919) 859-2243 Hydraulics Unit Address: Newland (919) 707-6726 Avery No None NCDWQ Surface Water Classification for Primary Receiving Water 303(d) Impairments: River Basin(s): Primary Receiving Water: Water Supply V (WS-V) Buffer Rules in Effect Project Description None Surrounding Land Use: Rural Residential0.07 100 0.16Project Built-Upon Area (ac.) Proposed Project Existing Site Project Length (lin. Miles or feet): Hand Existing Existing Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural Site Station Structure Fill In Fill In in Clearing in SW SW Impacts Impacts Stream No.(From/To)Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp.Design (ac)(ac)(ac)(ac)(ac)(ac)(ac)(ft)(ft)(ft) 12+20-12+52 -L-BOTTOMLESS CULVERT < 0.01 24 11+56 -11+98 -L-STREAMBANK STABILIZATION < 0.01 29 12+31 - 12+89 -L-STREAMBANK STABILIZATION < 0.01 < 0.01 30 12 TOTALS*: 0.01 0.01 54 41 0 *Rounded totals are sum of actual impacts NOTES: ATN Revised 3/12/13 SHEET 5 OF 5 NC DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS 02-04-2014 WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTS SURFACE WATER IMPACTS AVERY COUNTY BRIDGE 096 ON SR 1137 OVER BIRCHFIELD CREEK STABILIZATION REQUIREMENTS: Stabilization for this project shall comply with the time frame guidelines as specified by the NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina Department of Environment and Natural Resources Division of Water Quality. Temporary or permanent ground cover stabilization shall occur within 7 calendar days from the last land- disturbing activity, with the following exceptions in which temporary or permanent ground cover shall be provided in 14 calendar days from the last land-disturbing activity: • Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less • Slopes 3:1 or flatter, with a slope of length of 50 ft. or less • Slopes 4:1 or flatter The stabilization timeframe for High Quality Water (HQW) Zones shall be 7 calendar days with no exceptions for slope grades or lengths. High Quality Water Zones (HQW) Zones are defined by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent ground cover stabilization shall be achieved in accordance with the provisions in this contract and as directed. SEEDING AND MULCHING: (West) The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone, shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall be determined. All rates are in pounds per acre. Shoulder and Median Areas August 1 - June 1 May 1 - September 1 20# Kentucky Bluegrass 20# Kentucky Bluegrass 75# Hard Fescue 75# Hard Fescue 25# Rye Grain 10# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000# Limestone Areas Beyond the Mowing Pattern, Waste and Borrow Areas: August 1 - June 1 May 1 - September 1 100# Tall Fescue 100# Tall Fescue 15# Kentucky Bluegrass 15# Kentucky Bluegrass 30# Hard Fescue 30# Hard Fescue 25# Rye Grain 10# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000# Limestone Approved Tall Fescue Cultivars 2nd Millennium Duster Magellan Rendition Avenger Endeavor Masterpiece Scorpion Barlexas Escalade Matador Shelby Barlexas II Falcon II, III, IV & V Matador GT Signia Barrera Fidelity Millennium Silverstar Barrington Finesse II Montauk Southern Choice II Biltmore Firebird Mustang 3 Stetson Bingo Focus Olympic Gold Tarheel Bravo Grande II Padre Titan Ltd Cayenne Greenkeeper Paraiso Titanium Chapel Hill Greystone Picasso Tomahawk Chesapeake Inferno Piedmont Tacer Constitution Justice Pure Gold Trooper Chipper Jaguar 3 Prospect Turbo Coronado Kalahari Quest Ultimate Coyote Kentucky 31 Rebel Exeda Watchdog Davinci Kitty Hawk Rebel Sentry Wolfpack Dynasty Kitty Hawk 2000 Regiment II Dominion Lexington Rembrandt Approved Kentucky Bluegrass Cultivars: Alpine Bariris Envicta Rugby Apollo Bedazzled Impact Rugby II Arcadia Bordeaux Kenblue Showcase Arrow Champagne Midnight Sonoma Award Chicago II Midnight II Approved Hard Fescue Cultivars: Chariot Nordic Rhino Warwick Firefly Oxford Scaldis II Heron Reliant II Spartan II Minotaur Reliant IV Stonehenge On cut and fill slopes 2:1 or steeper add 20# Sericea Lespedeza January 1 - December 31. Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the 1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as a 10-20-20 analysis and as directed. TEMPORARY SEEDING: Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate of 400 pounds and seeded at the rate of 50 pounds per acre. German Millet, or Browntop Millet shall be used in summer months and rye grain during the remainder of the year. The Engineer will determine the exact dates for using each kind of seed. FERTILIZER TOPDRESSING: Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of fertilizer may be used provided the 2-1-1 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as 16-8- 8 analysis and as directed. SUPPLEMENTAL SEEDING: The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, and the rate of application may vary from 25# to 75# per acre. The actual rate per acre will be determined prior to the time of topdressing and the Contractor will be notified in writing of the rate per acre, total quantity needed, and areas on which to apply the supplemental seed. Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating seed into the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be used where degree of slope prevents the use of a sod seeder. MOWING: The minimum mowing height on this project shall be six inches. STABILIZATION REQUIREMENTS: Stabilization for this project shall comply with the time frame guidelines as specified by the NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina Department of Environment and Natural Resources Division of Water Quality. Temporary or permanent ground cover stabilization shall occur within 7 calendar days from the last land- disturbing activity, with the following exceptions in which temporary or permanent ground cover shall be provided in 14 calendar days from the last land-disturbing activity: • Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less • Slopes 3:1 or flatter, with a slope of length of 50 ft. or less • Slopes 4:1 or flatter The stabilization timeframe for High Quality Water (HQW) Zones shall be 7 calendar days with no exceptions for slope grades or lengths. High Quality Water Zones (HQW) Zones are defined by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent ground cover stabilization shall be achieved in accordance with the provisions in this contract and as directed. NATIVE GRASS SEEDING AND MULCHING: (West) Native Grass Seeding and Mulching shall be performed on the disturbed areas of wetlands and riparian areas, and adjacent to Stream Relocation and/or trout stream construction within a 50 foot zone on both sides of the stream or depression, measured from top of stream bank or center of depression. The stream bank of the stream relocation shall be seeded by a method that does not alter the typical cross section of the stream bank. Native Grass Seeding and Mulching shall also be performed in the permanent soil reinforcement mat section of preformed scour holes, and in other areas as directed. The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone, shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall be determined. All rates are in pounds per acre. August 1 - June 1 May 1 – September 1 18# Creeping Red Fescue 18# Creeping Red Fescue 8# Big Bluestem 8# Big Bluestem 6# Indiangrass 6# Indiangrass 4# Switchgrass 4# Switchgrass 35# Rye Grain 25# German or Browntop Millet 500# Fertilizer 500# Fertilizer 4000# Limestone 4000 Limestone Approved Creeping Red Fescue Cultivars: Aberdeen Boreal Epic Cindy Lou Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the 1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as a 10-20-20 analysis and as directed. Temporary Seeding Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate of 400 pounds and seeded at the rate of 50 pounds per acre. German Millet or Browntop Millet shall be used in summer months and rye grain during the remainder of the year. The Engineer will determine the exact dates for using each kind of seed. Fertilizer Topdressing Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of fertilizer may be used provided the 2-1-1 ratio is maintained and the rate of application adjusted to provide the same amount of plant food as 16-8- 8 analysis and as directed. Supplemental Seeding The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, and the rate of application may vary from 25# to 75# per acre. The actual rate per acre will be determined prior to the time of topdressing and the Contractor will be notified in writing of the rate per acre, total quantity needed, and areas on which to apply the supplemental seed. Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating seed into the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be used where degree of slope prevents the use of a sod seeder. Mowing The minimum mowing height shall be 6 inches. Measurement and Payment Native Grass Seeding and Mulching will be measured and paid for in accordance with Article 1660-8 of the Standard Specifications. LAWN TYPE APPEARANCE: All areas adjacent to lawns must be hand finished as directed to give a lawn type appearance. Remove all trash, debris, and stones ¾" and larger in diameter or other obstructions that could interfere with providing a smooth lawn type appearance. These areas shall be reseeded to match their original vegetative conditions, unless directed otherwise by the Field Operations Engineer. REFORESTATION: Description Reforestation will be planted within interchanges and along the outside borders of the road, and in other areas as directed. Reforestation is not shown on the plan sheets. See the Reforestation Detail Sheet. All non-maintained riparian buffers impacted by the placement of temporary fill or clearing activities shall be restored to the preconstruction contours and revegetated with native woody species. The entire Reforestation operation shall comply with the requirements of Section 1670 of the Standard Specifications. Materials Reforestation shall be bare root seedlings 12"-18" tall. Construction Methods Reforestation shall be shall be planted as soon as practical following permanent Seeding and Mulching. The seedlings shall be planted in a 16-foot wide swath adjacent to mowing pattern line, or as directed. Root dip: The roots of reforestation seedlings shall be coated with a slurry of water, and either a fine clay (kaolin) or a superabsorbent that is designated as a bare root dip. The type, mixture ratio, method of application, and the time of application shall be submitted to the Engineer for approval. With the approval of the Engineer, seedlings may be coated before delivery to the job or at the time of planting, but at no time shall the roots of the seedlings be allowed to dry out. The roots shall be moistened immediately prior to planting. Seasonal Limitations: Reforestation shall be planted from November 15 through March 15. Measurement and Payment Reforestation will be measured and paid for in accordance with Article 1670-17 of the Standard Specifications. ENVIRONMENTALLY SENSITIVE AREAS: Description This project is located in an Environmentally Sensitive Area. This designation requires special procedures to be used for clearing and grubbing, temporary stream crossings, and grading operations within the Environmentally Sensitive Areas identified on the plans and as designated by the Engineer. This also requires special procedures to be used for seeding and mulching and staged seeding within the project. The Environmentally Sensitive Area shall be defined as a 50-foot buffer zone on both sides of the stream or depression measured from top of streambank or center of depression. Construction Methods (A) Clearing and Grubbing In areas identified as Environmentally Sensitive Areas, the Contractor may perform clearing operations, but not grubbing operations until immediately prior to beginning grading operations as described in Article 200-1 of the Standard Specifications. Only clearing operations (not grubbing) shall be allowed in this buffer zone until immediately prior to beginning grading operations. Erosion control devices shall be installed immediately following the clearing operation. (B) Grading Once grading operations begin in identified Environmentally Sensitive Areas, work shall progress in a continuous manner until complete. All construction within these areas shall progress in a continuous manner such that each phase is complete and areas are permanently stabilized prior to beginning of next phase. Failure on the part of the Contractor to complete any phase of construction in a continuous manner in Environmentally Sensitive Areas will be just cause for the Engineer to direct the suspension of work in accordance with Article 108-7 of the Standard Specifications. (C) Temporary Stream Crossings Any crossing of streams within the limits of this project shall be accomplished in accordance with the requirements of Subarticle 107-12 of the Standard Specifications. (D) Seeding and Mulching Seeding and mulching shall be performed in accordance with Section 1660 of the Standard Specifications and vegetative cover sufficient to restrain erosion shall be installed immediately following grade establishment. Seeding and mulching shall be performed on the areas disturbed by construction immediately following final grade establishment. No appreciable time shall lapse into the contract time without stabilization of slopes, ditches and other areas within the Environmentally Sensitive Areas. (E) Stage Seeding The work covered by this section shall consist of the establishment of a vegetative cover on cut and fill slopes as grading progresses. Seeding and mulching shall be done in stages on cut and fill slopes that are greater than 20 feet in height measured along the slope, or greater than 2 acres in area. Each stage shall not exceed the limits stated above. Additional payments will not be made for the requirements of this section, as the cost for this work shall be included in the contract unit prices for the work involved. MINIMIZE REMOVAL OF VEGETATION: The Contractor shall minimize removal of vegetation at stream banks and disturbed areas within the project limits as directed. STOCKPILE AREAS: The Contractor shall install and maintain erosion control devices sufficient to contain sediment around any erodible material stockpile areas as directed. ACCESS AND HAUL ROADS: At the end of each working day, the Contractor shall install or re-establish temporary diversions or earth berms across access/haul roads to direct runoff into sediment devices. Silt fence sections that are temporarily removed shall be reinstalled across access/haul roads at the end of each working day. WASTE AND BORROW SOURCES: Payment for temporary erosion control measures, except those made necessary by the Contractor’s own negligence or for his own convenience, will be paid for at the appropriate contract unit price for the devices or measures utilized in borrow sources and waste areas. No additional payment will be made for erosion control devices or permanent seeding and mulching in any commercial borrow or waste pit. All erosion and sediment control practices that may be required on a commercial borrow or waste site will be done at the Contractor’s expense. All offsite Staging Areas, Borrow and Waste sites shall be in accordance with “Borrow and Waste Site Reclamation Procedures for Contracted Projects” located at: http://www.ncdot.gov/doh/operations/dp_chief_eng/roadside/fieldops/downloads/Files/Contracte dReclamationProcedures.pdf All forms and documents referenced in the “Borrow and Waste Site Reclamation Procedures for Contracted Projects” shall be included with the reclamation plans for offsite staging areas, and borrow and waste sites. TEMPORARY DIVERSION: This work consists of installation, maintenance, and cleanout of Temporary Diversions in accordance with Section 1630 of the Standard Specifications. The quantity of excavation for installation and cleanout will be measured and paid for as Silt Excavation in accordance with Article 1630-4 of the Standard Specifications. SAFETY FENCE AND JURISDICTIONAL FLAGGING: Description Safety Fence shall consist of furnishing materials, installing and maintaining polyethylene or polypropylene fence along the outside riparian buffer, wetland, or water boundary, or other boundaries located within the construction corridor to mark the areas that have been approved to infringe within the buffer, wetland, endangered vegetation, culturally sensitive areas or water. The fence shall be installed prior to any land disturbing activities. Interior boundaries for jurisdictional areas noted above shall be delineated by stakes and highly visible flagging. Jurisdictional boundaries at staging areas, waste sites, or borrow pits, whether considered outside or interior boundaries shall be delineated by stakes and highly visible flagging. Materials (A) Safety Fencing Polyethylene or polypropylene fence shall be a highly visible preconstructed safety fence approved by the Engineer. The fence material shall have an ultraviolet coating. Either wood posts or steel posts may be used. Wood posts shall be hardwood with a wedge or pencil tip at one end, and shall be at least 5 ft. in length with a minimum nominal 2" x 2” cross section. Steel posts shall be at least 5 ft. in length, and have a minimum weight of 0.85 lb/ft of length. (B) Boundary Flagging Wooden stakes shall be 4 feet in length with a minimum nominal 3/4” x 1-3/4” cross section. The flagging shall be at least 1” in width. The flagging material shall be vinyl and shall be orange in color and highly visible. Construction Methods No additional clearing and grubbing is anticipated for the installation of this fence. The fence shall be erected to conform to the general contour of the ground. (A) Safety Fencing Posts shall be set at a maximum spacing of 10 ft., maintained in a vertical position and hand set or set with a post driver. If hand set, all backfill material shall be thoroughly tamped. Wood posts may be sharpened to a dull point if power driven. Posts damaged by power driving shall be removed and replaced prior to final acceptance. The tops of all wood posts shall be cut at a 30- degree angle. The wood posts may, at the option of the Contractor, be cut at this angle either before or after the posts are erected. The fence geotextile shall be attached to the wood posts with one 2" galvanized wire staple across each cable or to the steel posts with wire or other acceptable means. Place construction stakes to establish the location of the safety fence in accordance with Article 105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for the staking of the safety fence. All stakeouts for safety fence shall be considered incidental to the work being paid for as “Construction Surveying”, except that where there is no pay item for construction surveying, all safety fence stakeout will be performed by state forces. The Contractor shall be required to maintain the safet y fence in a satisfactory condition for the duration of the project as determined by the Engineer. (B) Boundary Flagging Boundary flagging delineation of interior boundaries shall consist of wooden stakes on 25 feet maximum intervals with highly visible orange flagging attached. Stakes shall be installed a minimum of 6” into the ground. Interior boundaries may be staked on a tangent that runs parallel to buffer but must not encroach on the buffer at any location. Interior boundaries of hand clearing shall be identified with a different colored flagging to distinguish it from mechanized clearing. Boundary flagging delineation of interior boundaries will be placed in accordance with Article 105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for delineation of the interior boundaries. This delineation will be considered incidental to the work being paid for as Construction Surveying, except that where there is no pay item or construction surveying the cost of boundary flagging delineation shall be included in the unit prices bid for the various items in the contract. Installation for delineation of all jurisdictional boundaries at staging areas, waste sites, or borrow pits shall consist of wooden stakes on 25 feet maximum intervals with highly visible orange flagging attached. Stakes shall be installed a minimum of 6” into the ground. Additional flagging may be placed on overhanging vegetation to enhance visibility but does not substitute for installation of stakes. Installation of boundary flagging for delineation of all jurisdictional boundaries at staging areas, waste sites, or borrow pits shall be performed in accordance with Subarticle 230-4(B)(3)(d) or Subarticle 802-2(F) of the Standard Specifications. No direct pay will be made for this delineation, as the cost of same shall be included in the unit prices bid for the various items in the contract. The Contractor shall be required to maintain alternative stakes and highly visible flagging in a satisfactory condition for the duration of the project as determined by the Engineer. Measurement and Payment Safety Fence will be measured and paid as the actual number of linear feet of polyethylene or polypropylene fence installed in place and accepted. Such payment will be full compensation including but not limited to furnishing and installing fence geotextile with necessary posts and post bracing, staples, tie wires, tools, equipment and incidentals necessary to complete this work. Payment will be made under: Pay Item Pay Unit Safety Fence Linear Foot PERMANENT SOIL REINFORCEMENT MAT: Description This work consists of furnishing and placing Permanent Soil Reinforcement Mat, of the type specified, over previously prepared areas as directed. Materials The product shall be a permanent erosion control reinforcement mat and shall be constructed of synthetic or a combination of coconut and synthetic fibers evenly distributed throughout the mat between a bottom UV stabilized netting and a heavy duty UV stabilized top net. The matting shall be stitched together with UV stabilized polypropylene thread to form a permanent three-dimensional structure. The mat shall have the following minimum physical properties: Property Test Method Value Unit Light Penetration ASTM D6567 9 % Thickness ASTM D6525 0.40 in Mass Per Unit Area ASTM D6566 0.55 lb/sy Tensile Strength ASTM D6818 385 lb/ft Elongation (Maximum) ASTM D6818 49 % Resiliency ASTM D1777 >70 % UV Stability * ASTM D4355 >80 % Porosity (Permanent Net) ECTC Guidelines >85 % Maximum Permissible Shear Stress (Vegetated) Performance Bench Test >8.0 lb/ft2 Maximum Allowable Velocity (Vegetated) Performance Bench Test >16.0 ft/s *ASTM D1682 Tensile Strength and % strength retention of material after 1000 hours of exposure. Submit a certification (Type 1, 2, or 3) from the manufacturer showing: (A) the chemical and physical properties of the mat used, and (B) conformance of the mat with this specification. Construction Methods Matting shall be installed in accordance with Subarticle 1631-3(B) of the Standard Specifications. All areas to be protected with the mat shall be brought to final grade and seeded in accordance with Section 1660 of the Standard Specifications. The surface of the soil shall be smooth, firm, stable and free of rocks, clods, roots or other obstructions that would prevent the mat from lying in direct contact with the soil surface. Areas where the mat is to be placed will not need to be mulched. Measurement and Payment Permanent Soil Reinforcement Mat will be measured and paid for as the actual number of square yards measured along the surface of the ground over which Permanent Soil Reinforcement Mat is installed and accepted. Overlaps will not be included in the measurement, and will be considered as incidental to the work. Such payment shall be full compensation for furnishing and installing the mat, including overlaps, and for all required maintenance. Payment will be made under: Pay Item Pay Unit Permanent Soil Reinforcement Mat Square Yard WATTLES WITH POLYACRYLAMIDE (PAM): Description Wattles are tubular products consisting of excelsior fibers encased in synthetic netting. Wattles are used on slopes or channels to intercept runoff and act as a velocity break. Wattles are to be placed at locations shown on the plans or as directed. Installation shall follow the detail provided in the plans and as directed. Work includes furnishing materials, installation of wattles, matting installation, PAM application, and removing wattles. Materials Wattle shall meet the following specifications: 100% Curled Wood (Excelsior) Fibers Minimum Diameter 12 in. Minimum Density 2.5 lb/ft3 +/- 10% Net Material Synthetic Net Openings 1 in. x 1 in. Net Configuration Totally Encased Minimum Weight 20 lb. +/- 10% per 10 ft. length Anchors: Stakes shall be used as anchors. Wooden Stakes: Provide hardwood stakes a minimum of 2-ft. long with a 2 in. x 2 in. nominal square cross section. One end of the stake must be sharpened or beveled to facilitate driving down into the underlying soil. Matting shall meet the requirements of Article 1060-8 of the Standard Specifications, or shall meet specifications provided elsewhere in this contract. Provide staples made of 0.125" diameter new steel wire formed into a u shape not less than 12" in length with a throat of 1" in width. Polyacrylamide (PAM) shall be applied in powder form and shall be anionic or neutrally charged. Soil samples shall be obtained in areas where the wattles will be placed, and from offsite material used to construct the roadway, and analyzed for the appropriate PAM flocculant to be utilized with each wattle. The PAM product used shall be listed on the North Carolina Department of Environment and Natural Resources (NCDENR) Division of Water Quality (DWQ) web site as an approved PAM product for use in North Carolina. Construction Methods Wattles shall be secured to the soil by wire staples approximately every 1 linear foot and at the end of each section of wattle. A minimum of 4 stakes shall be installed on the downstream side of the wattle with a maximum spacing of 2 linear feet along the wattle, and according to the detail. Install a minimum of 2 stakes on the upstream side of the wattle according to the detail provided in the plans. Stakes shall be driven into the ground a minimum of 10 in. with no more than 2 in. projecting from the top of the wattle. Drive stakes at an angle according to the detail provided in the plans. Only install wattle(s) to a height in ditch so flow will not wash around wattle and scour ditch slopes and according to the detail provided in the plans and as directed. Overlap adjoining sections of wattles a minimum of 6 in. Installation of matting shall be in accordance with the detail provided in the plans, and in accordance with Article 1631-3 of the Standard Specifications, or in accordance with specifications provided elsewhere in this contract. Apply PAM over the lower center portion of the wattle where the water is going to flow over at a rate of 2 ounces per wattle, and 1 ounce of PAM on matting on each side of the wattle. PAM applications shall be done during construction activities after every rainfall event that is equal to or exceeds 0.50 in. The Contractor shall maintain the wattles until the project is accepted or until the wattles are removed, and shall remove and dispose of silt accumulat ions at the wattles when so directed in accordance with the requirements of Section 1630 of the Standard Specifications. Measurement and Payment Wattles will be measured and paid for by the actual number of linear feet of wattles which are installed and accepted. Such price and payment will be full compensation for all work covered by this section, including, but not limited to, furnishing all materials, labor, equipment and incidentals necessary to install the Wattles. Matting will be measured and paid for in accordance with Article 1631-4 of the Standard Specifications, or in accordance with specifications provided elsewhere in this contract. Polyacrylamide(PAM) will be measured and paid for by the actual weight in pounds of PAM applied to the wattles. Such price and payment will be full compensation for all work covered by this section, including, but not limited to, furnishing all materials, labor, equipment and incidentals necessary to apply the Polyacrylamide(PAM). Payment will be made under: Pay Item Pay Unit Polyacrylamide(PAM) Pound Wattle Linear Foot IMPERVIOUS DIKE: Description This work consists of furnishing, installing, maintaining, and removing an Impervious Dike for the purpose of diverting normal stream flow around the construction site. The Contractor shall construct an impervious dike in such a manner approved by the Engineer. The impervious dike shall not permit seepage of water into the construction site or contribute to siltation of the stream. The impervious dike shall be constructed of an acceptable material in the locations noted on the plans or as directed. Materials Acceptable materials shall include but not be limited to sheet piles, sandbags, and/or the placement of an acceptable size stone lined with polypropylene or other impervious geotextile. Earth material shall not be used to construct an impervious dike when it is in direct contact with the stream unless vegetation can be established before contact with the stream takes place. Measurement and Payment Impervious Dike will be measured and paid as the actual number of linear feet of impervious dike(s) constructed, measured in place from end to end of each separate installation that has been completed and accepted. Such price and payment will be full compensation for all work including but not limited to furnishing materials, construction, maintenance, and removal of the impervious dike. Payment will be made under: Pay Item Pay Unit Impervious Dike Linear Foot TEMPORARY PIPE FOR CULVERT CONSTRUCTION: Description This work consists of furnishing, installing, maintaining and removing any and all temporary pipe used on this project in conjunction with the culvert construction. Construction Methods The Contractor shall install temporary pipe in locations shown on the plans in such a manner approved by the Engineer. The temporary pipe shall provide a passageway for the stream through the work-site. The minimum size requirements will be as stated on the erosion control plans. Measurement and Payment __" Temporary Pipe will be measured and paid for at the contract unit price per linear foot of temporary pipe approved by the Engineer and measured in place from end to end. Such price and payment will be full compensation for all work covered by this section including but not limited to furnishing all materials required for installation, construction, maintenance, and removal of temporary pipe. Payment will be made under: Pay Item Pay Unit __" Temporary Pipe Linear Foot